Gunnar sits next to 4 phonetic neighbors — Gunner, Gunter, and Conor are the closest matches by sound. Most share Gunnar's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bold warrior, battle army"
"mighty power, ruler"
"brave warrior (later folk etymology)"
"always king"
"morning"
"victory of the people"
"God is gracious"
"dark man's settlement, coal-black farm"
"master of inspired frenzy"
"divine staff, royal pillar"
"peaceful, gentle as a dove"
"noble friend, elf friend"
"fallow land, uncultivated land"
"dragon"
"great"
"name of God"
"bear"
Similar sound: These names share phonetic patterns with Gunnar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Gunnar.
Rhythm: Gunnar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.